Exxon's (XOM) closely-watched outlook report is due out later today. Among the predictions: By...

Exxon's (XOM) closely-watched outlook report is due out later today. Among the predictions: By 2025, natural gas will replace coal as the leading fuel for generating electricity in the U.S., and will be the world's No. 2 fuel source overall, while global energy demand will grow 30% by 2040.